Clutch Masters 850 Series Twin Disc Steel Flywheel 06-09 Legacy GT Spec B / 04-21 STI | Lightweight Steel | Performance Flywheel
Overview
The Clutch Masters 850 Series Twin Disc Steel Flywheel is a precision-engineered upgrade designed for Subaru enthusiasts seeking enhanced clutch performance and durability. Specifically tailored for the 2006-2009 Legacy GT Spec B and 2004-2021 Subaru WRX STI, this flywheel complements Clutch Masters FX850 twin disc clutch kits, delivering improved throttle response and reduced rotational mass. It is ideal for drivers pushing their Subaru’s powertrain limits, whether on the street or track.
Manufactured in the USA with meticulous attention to detail, this flywheel is CNC machined from high-quality 1045 steel billet and finished with a black oxide coating for corrosion resistance and a distinctive look. Clutch Masters applies rigorous quality control, including zero balancing to ensure smooth operation and SFI 1.2 certification for motorsport use. This combination of engineering precision and durable materials sets it apart as a reliable component for demanding Subaru applications.
By reducing flywheel weight while maintaining strength, this steel flywheel enhances engine responsiveness and clutch engagement feel. For Subaru WRX STI and Legacy GT Spec B owners, this translates to quicker revving, improved acceleration, and a more connected driving experience. Its compatibility with both OEM and Clutch Masters clutch kits makes it a versatile upgrade for performance builds.
Features & Specifications
This Clutch Masters 850 Series Twin Disc Steel Flywheel is engineered for Subaru WRX STI and Legacy GT Spec B platforms and features a lightweight 1045 steel construction with black oxide finish. Constructed with precision CNC machining and zero balancing, it delivers enhanced clutch engagement and durability for Subaru enthusiasts seeking improved throttle response and motorsport readiness.
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Brand: Clutch Masters
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Product: 850 Series Twin Disc Steel Flywheel
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Part Number: FW-721-B-TDS
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Fitment: 2004-2005 Baja / 2004-2005 Forester / 2002-2005 WRX / 1991-1994 Legacy
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Material: 1045 Steel Billet
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Finish: Black Oxide Coating
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Construction: CNC Machined, Zero Balanced
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Origin: Made in USA
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Certification: SFI 1.2 Certified for Motorsport
Key Benefits
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Performance: Reduced rotational mass improves throttle response and acceleration for a more engaging driving experience.
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Durability: High-grade 1045 steel with black oxide finish resists corrosion and withstands demanding driving conditions.
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Fitment: Precision CNC machining and zero balancing ensure perfect fit and smooth operation on compatible Subaru models.
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Quality: Proudly manufactured in the USA with strict quality control and SFI certification for motorsport reliability.
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Compatibility: Designed to work seamlessly with OEM clutches or Clutch Masters FX100-FX500 single and twin disc kits.
What's Included
- 1× Clutch Masters 850 Series Twin Disc Steel Flywheel
- Installation instructions
Installation & Compatibility
Installation of the Clutch Masters 850 Series Twin Disc Steel Flywheel is recommended for experienced enthusiasts or professional mechanics due to the precision alignment and torque specifications required. No special tools beyond standard clutch and flywheel installation equipment are necessary. This flywheel is compatible with specific Subaru models listed in the fitment and requires pairing with appropriate clutch kits. Tuning is not required but recommended if other drivetrain modifications are present.
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Professional Installation: Recommended
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific year and trim level
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